TY - JOUR
T1 - An evaluation of thermal resistance as a measure of black carbon content in diesel soot, wood char, and sediment
AU - Nguyen, Thanh H.
AU - Brown, Roberta A.
AU - Ball, William P.
N1 - Funding Information:
This paper is based upon work supported by the National Science Foundation under Grant No. 9910174 and by an EPA Star Fellowship to Roberta A. Brown. Dr. Dianne Poster (NIST, Gaithersburg) provided diesel soot samples and conducted all of the PAHs analyses reported herein. Dr. Dwight M. Smith (University of Denver) provided hexane soot samples. Drs. Philip Gschwend and AmyMarie Accardi-Dey (MIT, Cambridge, MA) provided the GAC samples. Ms. Marie Fukudome (undergraduate student assistant, JHU) assisted with thermal pretreatment. Dr. Molly McGuire, Mr. Brian Vant-Hull and Ms. Laura Langley conducted the XPS measurements with our materials and Dr. D. Howard Fairbrother provided access to the instrument and assistance with data interpretation. Dr. Dennis Nagle, Dr. Andy Kercher (JHU Center for Nondestructive Evaluation), and Mr. Mark Koontz (JHU department of Material Science and Engineering) provided access to various instruments. Valuable review comments on the manuscript were received from Drs. Phil Gschwend, AmyMarie Accardi-Dey, and David Sabatini, as well as from an anonymous reviewer. We thank all of these individuals for their contributions and useful discussions. The authors would also like to acknowledge the surface analysis laboratory at Johns Hopkins University, which is part of the Materials Research Science and Engineering Center funded through the National Science Foundation.
PY - 2004/3
Y1 - 2004/3
N2 - The time dependence and efficacy of pretreatment by chemothermal oxidation for estimating black carbon (BC) content was evaluated using 28 samples of wood char, soot, activated carbon, and sediment. For 19 wood chars, 24-h carbon survival under air (at 375°C) varied between 0 and 44%, with no survival in any char formed at ≤850°C and even in some low H/C chars formed at 1000°C. Results depended not only on extent of carbonization, but also on physical attributes of particles. Because not all environmentally relevant BC is detected, the method is perhaps best considered as a semi-quantitative measure of soot content.
AB - The time dependence and efficacy of pretreatment by chemothermal oxidation for estimating black carbon (BC) content was evaluated using 28 samples of wood char, soot, activated carbon, and sediment. For 19 wood chars, 24-h carbon survival under air (at 375°C) varied between 0 and 44%, with no survival in any char formed at ≤850°C and even in some low H/C chars formed at 1000°C. Results depended not only on extent of carbonization, but also on physical attributes of particles. Because not all environmentally relevant BC is detected, the method is perhaps best considered as a semi-quantitative measure of soot content.
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U2 - 10.1016/j.orggeochem.2003.09.005
DO - 10.1016/j.orggeochem.2003.09.005
M3 - Article
AN - SCOPUS:1442291182
SN - 0146-6380
VL - 35
SP - 217
EP - 234
JO - Organic Geochemistry
JF - Organic Geochemistry
IS - 3
ER -